Patents Assigned to Hoffman & Hoffman, Ltd.
  • Oil lubrication rate monitor and controller
    Patent number: 5996739
    Abstract: A passive gravitational drip lubrication system which includes lubrication rate monitoring and control to provide a constant lubrication rate in which the lubricant flow from the reservoir is adjusted by an electromagnetic valve apparatus, a drop detection apparatus senses the amount of lubricant dispensed, and a servo control apparatus adjusts the preselected flow rate by adjusting the electromagnetic valve.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: December 7, 1999
    Assignee: Hoffman & Hoffman, Ltd.
    Inventor: Amos Hoffmann